dicotomía

dichotomy (a separation or division in two); dichotomy (a division of a class into two disjoint subclasses); dichotomy (bifurcation)

Borrowed from Ancient Greek διχοτομία (dikhotomía, “a cutting in half”), from διχῆ (dikhê, “in two, asunder”) + τέμνω (témnō, “to cut”).